Book/Report

FZJ-2016-06423

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Untersuchung eines Duplex-Spaltrohres in EVA I

Fedders, H.FZJ* ; Riensche, E.FZJ*

1982
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12894

Report No.: Juel-Spez-0179

Abstract: In EVA I a double walled reformer tube (duplex tube) was investigated. The main question concerned the heat transfer in the gap between outer and inner wall. Starting with the measured helium and process gas temperatures and the heat fluxes the temperatures and heat transfer coefficients of the gap could be evaluated by means of well known heat transfer correlations. The measured gap width reached values up to 2 mm. Thereby calculated heat transfer coefficients amount to about 13oo W/m$^{2}$K in good agreement with the measured values. The special construction of the duplex tube prevents largely the hydrogen permeation through the outer tube wall into the helium system. The hydrogen enrichment of the helium flowing through the gapwas measured gaschromatographically. The hydrogen permeation rate through the inner tube wall decreased within a few days by more than one order of magnitude in agreement with present results on tube segments.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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